Timepiece regulator



May 23, 1950 o. E. DuBois TIMEPIECE REGULATOR Filed Aug. 27, 1948 6X /Mx w. WQ 560W Patented May '23, Y195o TIMEPIECE REGULATOR Oscar Edmond Dubois, Vevey, Switzerland` Application August 27, 1948, Serial No. 46,393 In Switzerland April 21, 1948 3 Claims. l

y The present invention relates to timepiece regulators and more particularly to a timepiece regulator comprising a balance spring guard pivoted upon the short shank of the regulator lever, laterally in relation to the curb pin, and so shaped as to be able to grip the hairspring against this pin by exerting upon it a pressure at least approximately at right angles to the hairspring at this point, an operating member for this guard consisting of a pseudo-regulator lever arranged on the upper face of the regulator, and by a locking and manipulating member forthe regulator lever, this locking and manipulating member being concealed by the pseudo-regulator lever when the' latter is in its hairspring gripping position, all in such away that the hairspring, when once regulated, is nipped between the guard and the pin, so thatno lfresh regulation of the hairspring canbe effected until after it has been released by displacingtlie `pseudo-regulator lever to uncover -thelocking and manipulating member of thereg'ulator lever.

One form of construction of the invention is I illustrated by Way of example in the accompanyingdrawin'gainwhich:

Figure 1` is a plan view from above; and

Figure 2'is a view in side elevation.

In these drawings, I denotes thecock plank. carrying an end stone cap or index disc 2, on

the serge of which is pivoted with lubricate'dfric`v tion a regulator lever 3, comprising an annular part 3a, a long shank 3b designed as an index member and terminating in a'fork 3c, and a short shankfSal.Y TheA short shank 3d carries upon its underside a fixed pin 4 and a balance spring guard' 5 pivoted upon a peg 6, arranged laterally in relation to the curb pin 4. The guard is equipped with a nib or projection 5a, which is designed to force 'the hairspring 1 against the pin 4 by a movement at least approximately at right angles to the hairspring at this point, when the guard 5 ls rocked by means ofV an operating lever 8, rigid with the peg 8, and forming a Dseudoregulator lever bearing upon the vregulator lever 3. Between the limbs of the fork 3c of the regulatorris pivoted, upon a pin 9, an eccentric I0, serving for the manipulating and locking of the regulator lever 3, and provided for the manipulati-on thereof with a, diametral slot I I The pseudo-regulator lever 8 serving as an operating lever for the guardv 5'has at its free end a circular portion I2, which, when the pseudoregulator lever is so arranged that the guard 5 is in theV position for locking the hairspring 1, completely covers the forked end 3c of the long shank of the regulator lever 3 and the eccentric Ill, the longitudinal axis of the pseudo-regulator lever 8 then coinciding with the longitudinal axis of the regulator lever 3 The pseudo-regulator lever is maintained in this position by a pin I3 engaging in a lateral notch I4 in the regulator lever long shank 3b.

This regulating mechanism has the advantage of not permitting readjustment of the hairspring 1 until after the guard 5 has been released by displacing the pseudo-regulator lever 8 to uncover the eccentric I0. When the adjustment has been effected the pseudo-regulator lever is returned to its place above the regulator lever, its pin I3 engaging in the slot I4, and the guard 5 again nipping the hairspring against the curb pin 4, by exerting upon it a pressure at right angles to the hairspring at this point.

What I claim is:

1. A timepiece regulator comprising in combination a movable regulator lever having a long shank designed as an index and a short shank having a pair of members secured thereto for embracing the outer coil of a hairspring, said pair of members comprising a stationary curb pin and a guard pivoted upon said vshort shank laterally in relation to said curb pin and so shaped as to be able to grip the hairspring against said curb pin by exerting upon it a pressure at least vapproximately perpendicular on the "hairspring nih..

1. at this point, an operating member for s'aid pivoted guard consisting of a pseudo-regulator lever arrangedon the upper face of said regulator lever, and locking` and manipulating means for said regulator lever concealed by said pseudo-regulator lever when the latter is in its hairspring gripping position, whereby no fresh regulation of the hairspring can be done until after said pseudo-regulator lever has been displaced to uncover saidlocking and manipulating member,

2. A timepiece regulator as claimed in claim 1, wherein said regulator lever is formed with a forked long shank and said manipulating and locking means is an -eccentric arranged between the limbs of said forked long shank and cooperating therewith,

3. A timepiece regulator as claimed in claim 1,

wherein said long shank of` the regulator lever is formed with a notch in which engages an abutment pin on said pseudo-regulator lever when the latter is in the hairspring gripping position.

OSCAR EDMOND DUBOIS.

No references cited. 

